Sash-balance.



No. 68l,866. Patented Sept. 3, I901. J. H. WALLACE.& A. G. HILTON.

SASH BALANCE.

[Applicmion filed June 7, 1900.

(No Model.

IN YENTUFEE WITNESSES- iTED STATES PATENT OFFICE.

JAMES H. IVALLAOE AND ARTHUR G. HILTON, OF PROVIDENCE, RI'IODE ISLAND,ASSIGNORS TO THE INTERNATIONAL BURGLAR PROOF SASI-l- BALANCE AND LOOKCOMPANY, INCORPORATED, OF SAME PLACE.

SASH-BALANCEf SPECIFICATION forming part of Letters Patent No. 681,866,dated September 3, 1901. Application filed June 7, 1900. $erial No.19,405. (No model.)

To all whom, it may concern:

Be it known that we, JAMES H. WALLACE and ARTHUR G. HILTON, citizens ofthe United States, residing at Providence, in the county of Providenceand State of Rhode Island, have invented a new and useful Improvement inSash-Balances, of which the following is a specification.

In a sash-balance the weight of the sash is supported usually on thehelically-wound steel spring. The strength of the spring to support andbalance the weight of the sash depends, all other conditions beingequal, primarily on the width of the blade of the coiled spring. In suchwindow-sash balances the width of the casing is limited practically bythe width of the sash, for the case containing the sash-balance isrequired to be placed usually into the sash-groove of the windowframe.This sash-balance case is inserted into a recess, into which it snuglyfits, and all the parts of the mechanism must be contained within thewidth or thickness of the case.

To secure a spring of the widest possible blade and a substantialbearing for the springcase within the narrowest possible case is theobject of this invention.

The invention consists in the peculiar and novel construction whereby asubstantial bearing for the gear and spring-case and the widest possiblecoiled spring are secured within the case of the sash-balance, as 'willbe more fully set forth hereinafter.

4 is a perspective view of the post secured to one side of the boxcontaining the spring- .gear. Fig. 5 is a perspective view of the end ofthe coiled spring engaging with the post.

In the drawings, a indicates the face-plate, a the part of the casinginclosing the sashbalance, which is cast integral with the faceplate,and a the detachable part of the casing. The post a having the abutmenta and the journal-bearing a is secured to or plate b the casing. Figure1 is a sectional view of the sash-balpreferably cast in one piece withthe side wall a of the part a of the casing. The gearwheel I) has ahollow central body inclosed around the periphery by the wall I) and atone side by the plate b the opposite side being open for the insertionof the coiled spring. The plate 13 of the gear-wheel has the sleeve bprojecting inward into the central space of the gear I) and outwardthrough an'opening in the part a to the outer face of the casing. Thesleeve 11 is cast integral with the When assembled, the sleeve 12extends over and is journaled on the journalbearing a so that thegear-wheel is journaled on and rotates around the post.

The helically-coiled spring 0 is formed of a blade of steel ofpractically the full width of the central space in the gear-wheel I),only such clearance as is required to secure the free operation of thespring being allowed. The outer end of the coiled spring is secured tothe gear-wheel b, preferablyby means of a a turned-back arm 0 engagingwith an abutting seat 0 as is shown in Fig. 1. The blade 0 of the springis beveled to about half the Width of the remaining portion of the bladeof the spring 0 and the end is provided with a hook 0 adapted to engagewith the abutment a on the post a By this construction a substantialjournal-bearing for the gearwheel and a spring of considerable Width aresecured without any part projecting beyond The sash-balance may be madeto tightly fit the recess into which it is secured, thereby making aclean job.

Having thus described our invention, we claim as new'and desire tosecure by Letters Patent 1. In a sash-balance, in combination with theinclosing case having a post extending from one side, of aspring-actuated springcase having a sleeve extending inward from theside of the spring-case journaled on part of the post, and a spring theinner end of which is contracted in width and engages with the part ofthe post beyond the journalbearing of the spring-case, as described.

2. In a sash-balance, the combination with the ease inclosing thespring-actuated gear, a-post projecting from one side of the casing andacross the width of the casing, an abutment on the base of the post, anda journalbearing extending beyond the base, of a gearwheel having acentral space for the reception of the helically-coiled spring, a sleeveextending from the outside and the inside of the side plate of the gear,and a helically-wound spring having the Width of the plate near theinner end contracted to the Width of the base of the post and formedinto a hook and the outer end bent backward to form an arm; whereby awide spring may be used in a comparatively narrow case, as described.

3. In a sash-balance, in combination with the two-part casing inclosingthe actuatingg'ear, 'of the post a the journal-bearing a of lessdiameter than the base of the post, the gearb,the spring-cavity in thegear, the sleeve 11 projecting from thetwo sides of the plate b of thegear, and a helicallywound spring having one end engaging with the baseof the B. M. SIMMS, J. A. MILLER, J r.v

